<?php

function dd($v)
{
  echo "<pre>";
  print_r($v);
  echo "</pre>";
  exit;
}

function back($status, $msg = "", $row = array())
{
  $data = array(
    "status" => $status,
    "msg" => $msg,
    "data" => $row
  );
  header('Content-Type:application/json; charset=utf-8');
  $data  = json_encode($data, 0);
  exit($data);
}

//back(1,"444");